Improvement in fire and weather proof composition or artificial slates



.. consistency of thick paint.

UNrrnn STATES ATENT Orricn.

WILLIAM BLAKE, OF SHARON, OHIO.

IMPROVEMENT IN FIRE AND WEATHER PROOF COMPOSITION 0R ARTIFICIAL SLATES.

Specification forming part of Letters Patent No. 5, 190, dated March28,1848.

To all whom it may concern:

- Be it known that 1, WILLIAM BLAKE, of Sharon, in the county of Medinaand State of Ohio, have discovered and applied a new and useful Compoundfor Paints, Cements, and other Purposes; and I hereby declare that thefollowing is a full, clear, and exact description of the same, togetherwith the mannerof compounding and use.

I have discovered an earth composed of the following ingredients: Aboutone-halfis silica, one-quarter, or nearly so, is alumina, and smallerproportions of black oxide of iron, sulphuret of iroh,lime, and carbon.This material isof a dark color, and is found in a natural state inSharon, Medina county, Ohio. \Vheu taken from the earth it is about theconsistence of cold tallow, but upon exposure to the air and sun forseveral days it becomes hard like a stone. This earth I pulverize finelyby grinding and mix it with a drying-oil to about the The process ofgrinding-has been found very difficult, and required many experiments'tosucceed. I now employ rotary mills of stone or iron, afterdryingitthoroughly, and without the employment of water or other liquid.\Vhen mixed with drying-oil, as above stated, I can apply it with abrush to wood, cloth, paper, or any of the metals as a coating, andwhile in a green state, before the oil dries, I apply an additionalportion of the dry powder thereto by dusting it upon its surface.

To manufacture artificial slate of this substance, I apply a thickcoating of the compound to wood or paper, as above described, and thenrub the surface down smooth with common pumice-stone.

To make a fire-proof cement for stoves or fire-proof safes of thismaterial,I mix thepowder with oil to about the consistence of putty,with which the joints are stopped.

The surfaces covered with the above compound are fireproof andimpervious to water. They can be l'lliltlB'tO receive a perfect polishon the surface, or the surface may be left suitable t'or all thepurnoses of natural slate, and with as little difticulty as withordinary paints. When thoroughly dry and consolidated it becomes of theconsistency of stone or slate.

Having thus fully described my compound, what I claim as my invention,and desire to secure by Letters Patent as my discovery, is-- The newpaint or cement, made, substan tially as above described, by mixing theabovenamed earth with drying-oil in suitable proportions to produce theuseful results as hereiubefore described.

XVM. BLAKE.

Witnesses:

WM. H. BISHOP, J J. GRE'ENOUGI-I.

